Gotta love moms - Mander

Current thought is that mitochondria were smaller lifeforms first absorbed by a more complex cell.
Just wait until you read about eyeballs.
WHAT DO YOU MEAN???
We May Finally Know How Our Eyesight Evolved, And It's Not From Our Branch of Life

The evolution of the human eye has long been considered one of biology's more challenging mysteries, drawing debate over the sequence of steps required to turn rudimentary sensitivity to light into a complex photographic system.  New research suggests...

ScienceAlert
WE STOLE EYE PIGMENTS FROM BACTERIA? FRIGGIN AMAZING.